MET ("Military Effects Test") was a Los Alamos test of a composite 76cm diameter, U-233/plutonium bomb core (the first U.S. test of U-233) in a Mk 7 HE assembly. The purpose was to evaluate the destructive effects of nuclear explosions on military vehicles and matériel. The predicted yield was 28 kt, the actual yield was 22Kt, this difference seriously compromised the collected data. The primary objective was to confirm the phenomenon of precursor and 'dust loading' in increasing damage to drag sensitive targets, discovered accidentally during shots 9 and 10 of Operation Upshot-Knothole. The secondary objective was to measure damage to aircraft structures, by flying three radio-controlled QF- 80K drones directly above the blast. The timing of this test was so critical, that the tes was to be cancelled as little as 30 seconds before zero time if the aircraft were out of position. The inclusion of these drones required daylight, making MET the first US daytime tower shot.